Rear end oil reservoir



FIG. 1 is a top plan view of the rear end oil reservoir, showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is right side elevational view thereof; and,

FIG. 6 is left side elevational view thereof. 

The ornamental design for a rear end oil reservoir, as shown and described. 